| id | field name | definition |
|---|
| 0 | dsr_time |
| binary time | size: 12 |
|---|
Start time of the measurement
unit: "s since 2000-01-01"
value: float(./days) * 86400 + float(./seconds) + float(./microseconds) / 1000000
| binary record | size: 12 |
|---|
ENVISAT binary datetime
| id | field name | definition |
|---|
| 0 | days |
| binary int32 | size: 4 |
|---|
days since January 1st, 2000 (may be negative)
unit: "days since 2000-01-01"
|
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| 1 | seconds |
| binary uint32 | size: 4 |
|---|
seconds since start of day
unit: "s"
|
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| 2 | microseconds |
| binary uint32 | size: 4 |
|---|
microseconds since start of second
unit: "1e-6 s"
|
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|
| 1 | attach_flag |
| binary uint8 | size: 1 |
|---|
|
Attachment flag (set to 1 if there are no Transmission MDSRs or SATU MDSRs corresponding to this ADSR, set to zero otherwise)
|
|
| 2 | spec_shift |
| binary array[2336] | size: 4672 |
|---|
Spectral shift of the start spectra
| binary int16 (double) | size: 2 |
|---|
unit: "1e-4 nm"
converted unit: "nm" (multiply by 1/10000)
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|
|
| 3 | off_back |
| binary float | size: 4 |
|---|
Offset for the estimated background coding
unit: "e"
|
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| 4 | gain_back |
| binary float | size: 4 |
|---|
|
Gain for the estimated background coding
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| 5 | pcd |
| binary array[16] | size: 32 |
|---|
PCD at measurement level. The following values are reported. Despite the notation as a 'Flag' each value is in fact an integer value: 1. FLAG_DV(f) - data valid (0 = anomaly; 1 = time out; 3 = fully successful; 9 = missing packet); 2. Not used anymore; 3. FLAGS_time(f) - datation (0 = no datation problem; 1 = problem during the datation processing; 2 = invalid measurement (FLAG_DV(f) = 0 or 1); 9 = missing packet); 4. FLAG_rt(f) - ray-tracing (0 = no problem; 1 = wrong pointing (not in direction of the atmosphere); 2 = ray path across the Earth); 5. FLAG_gl(f) - geolocation (0 = no problem; 1 = geolocation problem); 6. FLAG_sat(f) - number of saturated samples per measurement; 7. FLAG_cr(f) - number of cosmic rays detected per measurement; 8. FLAG_irv(f) - vignetting correction flag (0 = no vignetting; 1 = vignetting occured during the measurement); 9. FLAG_bg(f) - number of background flagged data per measurement; 10. FLAG_out(f) - star spectrum out of band (0 = star spectrum inside central band; 1 = centre line of star spectrum image is outside the central band); 11. FLAG_ft(f) - number of samples per measurement for which full transmission flag FL_ft(k,f) has been raised; 12. FLAG^FP_sat(1,f) - number of photometer 1 saturations; 13. FLAG^FP_sat(2,f) - number of photometer 2 saturations; 14. FLAG - stability flag (0 = no measurement skipped; n = first measurement used to compute the reference star spectrum is number n (index starting at 0)); 15. FLAG mod(f) - Demodulation correction flag (0 = no problem, +1 = problem of structure for SPA1 upper band; +2 = problem of structure for SPA1 lower band; +4 = inconsistent upper and lower band structures for SPA1; +10 = problem of structure for SPA2 upper band; +20 = problem of structure for SPA2 lower band; +40 = inconsistent upper and lower band structures for SPA2); 16. FLAG_uc(f) - ratio between the averaged upper band signel and the averaged star signal over the SPA2 spectral range (n < 65535 = computed ration expressed in %; 65535 = star signal is equal to 0).
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